Dellonda 2-4 Person Hot Tub/Spa Inflatable Heat Retaining Lid - DL29
Floats on top of the water to help maintain heat of water when not in use. Put the bladder onto the spa pool underneath the cover. Fits 2-4 Person Dellonda Hot Tub/Spas DL16 and DL23. MFR Part No.: DL29.